[DeTomaso] Thermostat warning #2
MikeLDrew at aol.com
MikeLDrew at aol.com
Thu May 4 17:51:14 EDT 2017
All,
A couple of months ago I posted a warning about 351C thermostats, and parts
store counter monkeys who didn't know the difference between them and the
351W version. I posted pictures and part numbers for the NAPA brand
180-degree 351C version.
Well, here's a story. That came about because I was sourcing one for a
fellow in England. I sent it to him, and he thought he had developed an
engine/cooling problem, because the engine heated up to over 200 degrees while
the radiator pipes remained cold, so he shut it down. He later 'let it
ride', and the thermostat opened and the radiator started cooling, but the
temperature was 195-200 as measured on the front of the block.
He pulled the thermostat and tested it in a pot of water on the stove; it
didn't start opening until 195 and was fully open at 200--not 180 as
advertised.
So the other day I went and bought another one (from the same batch, as the
store got two of them in when I only ordered one), and lo and behold, this
one also failed to start opening until 195 degrees. Back to the store it
went.
I then went across the street and got one from O'Reilly, the Murray (that's
their home brand) 3468. (See attached). I brought that one home and
stovetop tested it, and it started opening at about 184 degrees, not far off
from the advertised 180 degrees. Now that one is in a box on the way to
England.
The point is, not only do you have to make sure you are getting a proper
351C thermostat, you should also test it before installation to make SURE it
opens when it should!
Cheers!
Mike
-------------- next part --------------
All,
A couple of months ago I posted a warning about 351C thermostats, and
parts store counter monkeys who didn't know the difference between them
and the 351W version. I posted pictures and part numbers for the NAPA
brand 180-degree 351C version.
Well, here's a story. That came about because I was sourcing one for a
fellow in England. I sent it to him, and he thought he had developed
an engine/cooling problem, because the engine heated up to over 200
degrees while the radiator pipes remained cold, so he shut it down. He
later 'let it ride', and the thermostat opened and the radiator started
cooling, but the temperature was 195-200 as measured on the front of
the block.
He pulled the thermostat and tested it in a pot of water on the stove;
it didn't start opening until 195 and was fully open at 200--not 180 as
advertised.
So the other day I went and bought another one (from the same batch, as
the store got two of them in when I only ordered one), and lo and
behold, this one also failed to start opening until 195 degrees. Back
to the store it went.
I then went across the street and got one from O'Reilly, the Murray
(that's their home brand) 3468. (See attached). I brought that one
home and stovetop tested it, and it started opening at about 184
degrees, not far off from the advertised 180 degrees. Now that one is
in a box on the way to England.
The point is, not only do you have to make sure you are getting a
proper 351C thermostat, you should also test it before installation to
make SURE it opens when it should!
Cheers!
Mike
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